fixed some warnings from pvs-studio

bot's don't change enemy to teamkiller if currently busy with real enemy
checks for user rendering (invisibility, got from podbot_mm)
no hunting of seek cover when escaping from bomb

include/corelib.h

@@ -3932,14 +3932,6 @@ public:
    }
 };
 
-//
-// Class: RandomGenerator
-//  Random number generator.
-//
-class RandomGenerator
-{
-
-};
 //
 // Type: StrVec
 //  Array of strings.
@@ -4080,6 +4072,6 @@ public:
 // See Also:
 //  <Array>
 //
-#define IterateArray(arrayName, iteratorName) \
+#define FOR_EACH_AE(arrayName, iteratorName) \
    for (int iteratorName = 0; iteratorName != arrayName.GetElementNumber (); iteratorName++)